1392 eXtensible ARchive format Aggregate XAR (eXtensible Archive format) is an open source file archiver introduced in Mac OS X 10.5. 195 Artefactual Systems Inc / Artefactual Systems Inc 12 Nov 2013 http://code.google.com/p/xar/wiki/xarformat http://code.google.com/p/xar/wiki/whyxar 12 Nov 2013 fmt/600 PUID xar File extension 937 eXtensible ARchive format BOF: xar!.. Magic num (4 bytes), header length (2 bytes, value 001C). Next two bytes are version number - currently 0001 so possibility to extend signature, particularly if subsequent versions developed. 1 Absolute from BOF 0 0 78617221001C